package com.zym.community.controller;

import com.google.code.kaptcha.Producer;
import com.zym.community.entity.User;
import com.zym.community.service.UserService;
import com.zym.community.util.CommunityConstant;
import com.zym.community.util.CommunityUtil;
import com.zym.community.util.RedisKeyUtil;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Controller
@Api("登录接口")
public class LoginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);

    @Autowired
    private UserService userService;

    @Autowired
    private Producer KaptchaProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    @GetMapping("/register")
    @ApiOperation("跳转到注册页面")
    public String getRegisterPage(){
        return "site/register";
    }

    @GetMapping("/login")
    @ApiOperation("跳转到登录页面")
    public String getLoginPage(){
        return "site/login";
    }

    @PostMapping("/register")
    @ApiOperation("注册")
    public String register(Model model, User user){
        Map<String, Object> map = userService.register(user);
        if (map == null || map.isEmpty()){
            model.addAttribute("msg", "注册成功，我们已经向您的邮箱发送了一封激活邮件，请尽快激活。");
            model.addAttribute("target", "/index");
            return "site/operate-result";  //中转页面
        }else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "site/register";  //回到注册页面
        }

    }

    ////激活地址格式：http://localhost:8080/community/activation/101/code
    @GetMapping("/activation/{userId}/{code}")
    @ApiOperation("激活账号")
    public String activation(Model model, @PathVariable("userId") int userId, @PathVariable("code") String code){
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS){
            model.addAttribute("msg", "激活成功！您的账号可以正常使用了。");
            model.addAttribute("target", "/login");
        }else if (result == ACTIVATION_REPEAT){
            model.addAttribute("msg", "无效操作，该账号已经激活过了。");
            model.addAttribute("target", "/login");
        }else {
            model.addAttribute("msg", "激活失败！激活码不正确");
            model.addAttribute("target", "/index");
        }
        return "site/operate-result";
    }

    @GetMapping("/kaptcha")
    @ApiOperation("获得验证码")
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/){
        //生成验证码
        String text = KaptchaProducer.createText();
        BufferedImage image = KaptchaProducer.createImage(text);

        //将验证码存入session
        //session.setAttribute("kaptcha", text);

        //验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner", kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //将验证码存入Redis
        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey, text, 60, TimeUnit.SECONDS);

        //将图片输出到浏览器
        response.setContentType("image/png");
        try (OutputStream os = response.getOutputStream()) {
            ImageIO.write(image, "png", os);
        }catch (Exception e){
            logger.error("响应验证码失败" + e.getMessage());
        }
    }

    @PostMapping("/login")
    @ApiOperation("登录")
    public String login(String username, String password, String code, boolean rememberme,
                        Model model, /*HttpSession session,*/ HttpServletResponse response,
                        @CookieValue("kaptchaOwner") String kaptchaOwner){
        //检查验证码
        //String kaptcha = (String) session.getAttribute("kaptcha");
        String kaptcha = null;
        if (StringUtils.isNotBlank(kaptchaOwner)){
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) redisTemplate.opsForValue().get(redisKey);
        }

        if (StringUtils.isBlank(code) || StringUtils.isBlank(kaptcha) || !code.equalsIgnoreCase(kaptcha)){
            model.addAttribute("codeMsg", "验证码不正确！");
            return "site/login";
        }

        //设置登录凭证的超时时间，检查账号、密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")){
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);  //返回cookie给客户端
            return "redirect:/index";
        }else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "site/login";
        }
    }

    @GetMapping("/logout")
    @ApiOperation("注销")
    public String logout(@CookieValue("ticket") String ticket){
        userService.logout(ticket);
        SecurityContextHolder.clearContext();
        return "redirect:/login";
    }
}
